/* -*-c++-*- */
/* osgGIS - GIS Library for OpenSceneGraph
 * Copyright 2007-2008 Glenn Waldron and Pelican Ventures, Inc.
 * http://osggis.org
 *
 * osgGIS is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

#ifndef _OSGGIS_ELEVATION_RESOURCE_H_
#define _OSGGIS_ELEVATION_RESOURCE_H_ 1

#include <osgGIS/Common>
#include <osgGIS/ElevationGrid>
#include <osgGIS/Resource>
#include <osgGIS/RasterStore>
#include <osg/Vec4>
#include <osg/StateSet>

namespace osgGIS
{
    /* (work in progress - no public api docs yet)
     *
     * A georeferenced elevation grid that can be used for querying terrain heights.
     */
    class OSGGIS_EXPORT ElevationResource : public Resource
    {
        OSGGIS_META_RESOURCE(ElevationResource);

    public:
        ElevationResource();

        ElevationResource( const std::string& name );

    public:

        /**
         * Extracts and creates an elevation grid from the resource that you can then
         * query for height values.
         */
        ElevationGrid* createGrid( const GeoExtent& aoi ) const;

    public: 

        virtual void setProperty( const Property& prop );
        virtual Properties getProperties() const;

    protected:

        virtual ~ElevationResource();

    private:
        void init();
    };
    
    typedef std::vector< osg::ref_ptr<ElevationResource> > ElevationResourceVec;
}

#endif // _OSGGIS_ELEVATION_RESOURCE_H_
